In this Tech Talk, we propose an efficient workflow for conceptual structural sizing, which benefits from the tight integration of parametric design, simulation and optimization capabilities.
Determining appropriate lightweight configurations for the airframe structure of Urban Air Mobility (UAM) vehicles requires a multidisciplinary workflow for conceptual structural sizing with tight integration of parametric design, simulation and optimization.
Based on parametric design data generated through a combination of graphical visual scripting and interactive 3D modeling using CATIA xGenerative Design, we create logic to parametrically build all required components of the internal structure, including ribs, spars, frames, and stringers based on the conceptual exterior surface of the UAM vehicle. A fully associated structural model with this parametric design model allows design space exploration.
With the Fluid Dynamics application on the 3DEXPERIENCE platform, we determine aerodynamic loads as a function of angle of attack, to compute rotor forces balancing aerodynamic, inertia and gravity loads.
Considering two critical flight conditions, we combine parametric and non-parametric structural optimization techniques aiming at minimal weight for a targeted stress level. Based on results from a parametric design study, an optimized configuration such as the number of stringers and ribs in the wing of the UAM vehicle is determined. Non-parametric optimization of skin thicknesses and stiffener properties reduces mass further. Finally, we perform structural requirement checks for buckling and strength to validate the optimized configuration.
